Steel construction unloading tool

Abstract

This invention relates to the field of steel structure construction technology and discloses a steel structure unloading tool, comprising a vertical cylinder; a piston movable inside the vertical cylinder and fixedly mounted on its top with a support plate, supported by dry sand filled inside the vertical cylinder; and a bottom cylinder located at the bottom of the vertical cylinder and connected to it, with a movable plug inside the bottom cylinder that moves vertically to change the volume of the bottom cylinder. The vertical cylinder and the support plate are positioned between the support frame and the steel component, serving to support the steel component. When the steel component needs to be unloaded in stages, the movable plug inside the bottom cylinder is gradually moved downwards to gradually increase the volume of the vertical cylinder and the bottom cylinder; similarly, when the support height needs to be increased, the movable plug inside the bottom cylinder is gradually moved upwards to gradually decrease the volume of the vertical cylinder and the bottom cylinder. By adjusting the volume of the vertical cylinder and the bottom cylinder, the support positions of the piston and the support plate can be adjusted, greatly improving the effectiveness of the unloading tool.

Description

Technical Field

[0001] This invention relates to the field of steel structure building construction technology, specifically a steel structure unloading tool. Background Technology

[0002] After the main steel structure is installed to form a spatially stable system and all welding and connection work is completed, it is often necessary to unload the temporary support frame. This is especially true for urban exhibition halls, where the irregular shape means that the stress and unloading stroke at each point of the temporary support used in construction are different. Therefore, there is an urgent need for a simple, easy-to-use, and easy-to-adjust unloading tool. Currently, there are three main methods for unloading steel structure support frames: jack unloading, direct cutting of rigid supports unloading, and sand box unloading.

[0003] Hydraulic jacks are mainly used for unloading steel components by using their lifting force to move the steel components up and down. However, existing jack unloading technologies have problems with poor performance and environmental friendliness. Due to the long-term load on the jacks, the hydraulic system is prone to hydraulic oil leakage, which pollutes the environment. At the same time, pressure loss can also cause the jacks to retract abnormally, making the working state out of control and adversely affecting structural safety, thus posing safety hazards.

[0004] The direct cutting method for rigid supports is generally used for unloading in small-tonnage and short-stroke conditions. However, when used in steel structure unloading, it has disadvantages such as low synchronous control accuracy. Because segmented cutting requires artificial oxy-acetylene flame cutting on the top of the support, uneven cut marks will appear on the end cut surface after a certain stage of cutting due to the influence of cutting angle, heat melting range and cutting line, which affects the accuracy of unloading displacement.

[0005] However, sandbox unloading, as a relatively traditional unloading method, has the following problems:

[0006] 1. Traditional sandboxes have large gaps between the inner and outer cylinders, resulting in poor waterproofing. This makes the sand prone to dampness and clumping due to water ingress, preventing it from draining freely.

[0007] Second, traditional sandboxes can only control the downward displacement by discharging sand, but cannot effectively raise them. During the installation and adjustment stages of the sandboxes, the inability to move the sandboxes upward will cause many problems, resulting in poor support accuracy of the steel structure.

[0008] Based on this, we propose a steel structure unloading tool. Summary of the Invention

[0009] To address the shortcomings of existing technologies, this invention provides a steel structure unloading tool that has the advantages of good sealing performance and the ability to displace the support plate upwards.

[0010] To achieve the aforementioned goals of good sealing performance and upward displacement of the support plate, the present invention provides the following technical solution: a steel structure unloading tool, comprising:

[0011] Vertical tube;

[0012] A piston that moves inside a vertical cylinder and is fixed at the top with a support plate is supported by dry sand filling the inside of the vertical cylinder.

[0013] The bottom cylinder, which is located at the bottom of the vertical cylinder and is connected to it, has a movable plug inside that moves up and down to change the volume of the bottom cylinder.

[0014] As a preferred embodiment of the present invention, a sleeve is fixedly installed at the bottom of the support plate, and the sleeve is movably sleeved on the vertical cylinder.

[0015] As a preferred embodiment of the present invention, the outer wall of the vertical cylinder is uniformly provided with limiting strips, and the inner wall of the sleeve is uniformly provided with limiting grooves coupled with the limiting strips.

[0016] As a preferred embodiment of the present invention, a lead screw is rotatably connected to the bottom of the movable plug, the lead screw is threaded into a nut, and the nut is fixedly installed on the tail plate at the bottom end of the bottom cylinder.

[0017] As a preferred embodiment of the present invention, a plug rod is fixedly installed at the bottom of the movable plug, and the plug rod is movably inserted into the tail plate.

[0018] As a preferred embodiment of the present invention, a sand discharge pipe is connected through the inner wall of the bottom cylinder, the end of the sand discharge pipe extends to the outside of the bottom cylinder, and a sand discharge valve is provided thereon.

[0019] As a preferred embodiment of the present invention, a support frame is also provided, wherein the vertical cylinder and the support plate are disposed between the support frame and the steel component.

[0020] As a preferred embodiment of the present invention, the support frame consists of a horizontal plate and legs evenly arranged at the bottom of the horizontal plate;

[0021] The top of the horizontal plate is provided with a receiving groove for placing the vertical cylinder, and the bottom of the receiving groove is provided with a through groove for accommodating the bottom cylinder.

[0022] The sidewall of the receiving groove is evenly provided with flower grooves, and the outer wall of the vertical cylinder is evenly provided with splines coupled to the flower grooves.

[0023] As a preferred embodiment of the present invention, auxiliary support rods for supporting steel components are also provided on the left and right sides of the top of the horizontal plate.

[0024] As a preferred embodiment of the present invention, the bottom end of the auxiliary support rod is movably inserted into the vertical groove opened on the horizontal plate;

[0025] A side groove is formed between the inner wall of the vertical groove and the outer peripheral wall of the horizontal plate, and a pad for supporting the auxiliary support rod is slidably disposed in the side groove.

[0026] Beneficial effects

[0027] Compared with the prior art, the present invention provides a steel structure unloading tool, which has the following beneficial effects:

[0028] 1. This steel structure unloading tool has a vertical cylinder and a support plate positioned between the support frame and the steel component, serving to support the steel component. When unloading the steel component in stages, the moving plug inside the bottom cylinder is gradually moved downwards to gradually increase the volume of the vertical cylinder and the bottom cylinder. Similarly, when the support height needs to be increased, the moving plug inside the bottom cylinder is gradually moved upwards to gradually decrease the volume of the vertical cylinder and the bottom cylinder. By adjusting the volume of the vertical cylinder and the bottom cylinder, the support position of the piston and the support plate can be adjusted.

[0029] 2. The steel structure unloading tool has a sleeve fitted onto the vertical cylinder, which provides an excellent sealing effect and effectively prevents water from entering the vertical cylinder. At the same time, the limiting strip and limiting groove are respectively set on the vertical cylinder, the outer wall, and the inner wall of the sleeve, instead of on the inner wall of the vertical cylinder and the outer wall of the piston. This significantly improves the accuracy between the piston and the vertical cylinder and makes it easier to control the gap between them. Attached Figure Description

[0030] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a cross-sectional view of the overall structure of the present invention;

[0032] Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle;

[0033] Figure 4 This is a schematic diagram illustrating the usage state of the present invention;

[0034] Figure 5 This is a front view of the horizontal plate portion of the present invention;

[0035] Figure 6 This is an enlarged schematic diagram of the horizontal plate portion of the present invention.

[0036] In the diagram: 1. Vertical cylinder; 2. Piston; 3. Support plate; 4. Sleeve; 5. Limiting strip; 6. Limiting groove; 7. Bottom cylinder; 8. Moving plug; 9. Lead screw; 10. Lead nut; 11. Tail plate; 12. Insert rod; 13. Sand discharge pipe; 14. Sand discharge valve; 15. Horizontal plate; 16. Support leg; 17. Receiving groove; 18. Through groove; 19. Groove; 20. Spline; 21. Steel component; 22. Secondary support rod; 23. Vertical groove; 24. Side groove; 25. Pad plate; 26. Cylinder. Detailed Implementation

[0037] Example:

[0038] Please see Figures 1-6 A steel structure unloading tool, comprising:

[0039] A vertical tube 1 with an opening at the top;

[0040] The piston 2, which moves inside the vertical cylinder 1 and is fixedly mounted on the top with a support plate 3, is supported by the dry sand filling the vertical cylinder 1. The height of the piston 2 can be controlled by controlling the remaining amount of dry sand.

[0041] A bottom cylinder 7 is set at the bottom of the vertical cylinder 1 and is connected to the vertical cylinder 1 through it. A movable plug 8 is installed inside the bottom cylinder 7 to change its volume.

[0042] A support frame is also provided, with the vertical cylinder 1 and the support plate 3 positioned between the support frame and the steel component 21;

[0043] The vertical cylinder 1 and the support plate 3 are positioned between the support frame and the steel component 21, serving to support the steel component 21. When the steel component 21 needs to be unloaded step by step, the movable plug 8 inside the bottom cylinder 7 is gradually moved downwards to gradually increase the volume of the vertical cylinder 1 and the bottom cylinder 7. Similarly, when the support height needs to be increased, the movable plug 8 inside the bottom cylinder 7 is gradually moved upwards to gradually decrease the volume of the vertical cylinder 1 and the bottom cylinder 7. By adjusting the volume of the vertical cylinder 1 and the bottom cylinder 7, the support positions of the piston 2 and the support plate 3 can be adjusted.

[0044] In this embodiment, as Figure 3 and Figure 4 As shown, a lead screw 9 is rotatably connected to the bottom of the movable plug 8. The lead screw 9 is threaded into the lead screw nut 10. The lead screw nut 10 is fixedly installed on the tail plate 11 at the bottom end of the bottom cylinder 7. An insertion rod 12 is fixedly installed at the bottom of the movable plug 8. The insertion rod 12 is movably inserted into the tail plate 11.

[0045] By controlling the rotation of the lead screw 9, the up-and-down movement of the movable plug 8 can be controlled. Furthermore, by inserting the rod 12 into the tail plate 11, the rotation of the movable plug 8 can be effectively restricted, so that the movable plug 8 can only move up and down under the drive of the lead screw 9.

[0046] In addition, a sand discharge pipe 13 is also connected through the inner wall of the bottom cylinder 7. The end of the sand discharge pipe 13 extends to the outside of the bottom cylinder 7 and a sand discharge valve 14 is installed on it.

[0047] like Figure 3 As shown, under normal conditions, the moving plug 8 adjusts the height of the support plate 3 by changing the volume of the bottom cylinder 7. When the moving plug 8 moves down to the end position, the inlet of the sand discharge pipe 13 will be opened. At this time, the sand discharge valve 14 is opened, and the dry sand in the bottom cylinder 7 can be discharged through the sand discharge pipe 13. Consequently, the piston 2 and the support plate 3 can move down significantly.

[0048] In this embodiment, as Figure 2 As shown, a sleeve 4 is fixedly installed at the bottom of the support plate 3. The sleeve 4 is movably sleeved on the vertical cylinder 1. Limiting strips 5 are evenly arranged on the outer wall of the vertical cylinder 1. Limiting grooves 6 coupled with the limiting strips 5 are evenly opened on the inner wall of the sleeve 4.

[0049] The sleeve 4 is fitted onto the vertical cylinder 1, providing an excellent sealing effect and effectively preventing water from entering the vertical cylinder 1. Meanwhile, the limiting strip 5 and the limiting groove 6 are respectively set on the vertical cylinder 1 and the outer wall and the inner wall of the sleeve 4, and are no longer set on the inner wall of the vertical cylinder 1 and the outer wall of the piston 2. This significantly improves the accuracy between the piston 2 and the vertical cylinder 1, making it easier to control the gap between them.

[0050] like Figure 4 , Figure 5 and Figure 6 As shown, the support frame consists of a horizontal plate 15 and legs 16 evenly arranged at the bottom of the horizontal plate 15. The top of the horizontal plate 15 is provided with a receiving groove 17 for placing the vertical cylinder 1, and the bottom of the receiving groove 17 is provided with a through groove 18 for accommodating the bottom cylinder 7. The arrangement of the receiving groove 17 and the through groove 18 facilitates the placement of the vertical cylinder 1 and the bottom cylinder 7.

[0051] In addition, the side wall of the receiving groove 17 is evenly provided with flower grooves 19, and the outer wall of the vertical cylinder 1 is evenly provided with splines 20 coupled with the flower grooves 19. Through the coupling of the splines 20 on the outer wall of the vertical cylinder 1 in the flower grooves 19, the stability of the vertical cylinder 1 can be further improved.

[0052] like Figure 5 As shown, secondary support rods 22 are also provided on the left and right sides of the top of the horizontal plate 15 to support the steel component 21. The secondary support rods 22 can further improve the support effect on the steel component 21 and ensure the stability of the overall structure.

[0053] In this embodiment, the bottom end of the auxiliary support rod 22 is movably inserted into the vertical groove 23 opened on the horizontal plate 15. A side groove 24 is opened through the inner side wall of the vertical groove 23 and the outer peripheral wall of the horizontal plate 15. A pad 25 for supporting the auxiliary support rod 22 is slidably arranged in the side groove 24. Thus, by inserting pads 25 of different thicknesses into the vertical groove 23, the auxiliary support rod 22 can be raised to different heights.

[0054] In this embodiment, a cylinder 26 is also provided. The cylinder 26 is mounted on the horizontal plate 15 and can support the steel component 21 by the lifting stroke of the output shaft.

[0055] In use, first install the horizontal plate 15 and the support leg 16 below the steel component 21, then support the steel component 21 with the cylinder 26. After it is supported, install the vertical cylinder 1 assembly and the auxiliary support rod 22 on the horizontal plate 15. After the vertical cylinder 1 assembly and the auxiliary support rod 22 are installed, control the output shaft of the cylinder 26 to retract, and the steel component 21 will be mounted on the vertical cylinder 1 assembly and the auxiliary support rod 22.

[0056] When it is necessary to unload the steel component 21, the piston 2 and the support plate 3 can be moved downward by controlling the downward movement of the moving plug 8 in the bottom cylinder 7. As for the shortening of the auxiliary support rod 22, it is achieved by cutting. Specifically, during unloading, first install the cylinder 26 and make the cylinder 26 support the steel component 21. Then, move the support plate 3 and the auxiliary support rod 22 downward respectively. After moving to the appropriate position, remove the cylinder 26.

[0057] If the steel component 21 needs to be lifted again during unloading, for the piston 2, the movable plug 8 can be moved upward in the bottom cylinder 7, and the piston 2 and the support plate 3 will also move upward. For the auxiliary support rod 22, pads 25 of different thicknesses can be placed at its bottom so that its top is flush with the support plate 3.

[0058] Therefore, in this embodiment, by setting up mechanisms such as the movable plug 8 and the pad 25, it is not only convenient to unload the steel component 21, but also to freely support the steel component 21.

[0059] The above are merely embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structures made using the contents of the present invention specification and drawings, whether directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of the present invention.

Claims

1. A steel structure unloading tool, characterized in that, include: Vertical tube (1); The piston (2) moves inside the vertical cylinder (1) and is fixedly mounted on the top with a support plate (3), and is supported by dry sand filled inside the vertical cylinder (1); A bottom cylinder (7) is set at the bottom of the vertical cylinder (1) and is connected to the vertical cylinder (1) through it. A movable plug (8) is installed inside the bottom cylinder (7) to change the volume of the bottom cylinder (7). A sleeve (4) is fixedly installed at the bottom of the support plate (3), and the sleeve (4) is movably sleeved on the vertical cylinder (1); The outer wall of the vertical cylinder (1) is uniformly provided with limiting strips (5), and the inner wall of the sleeve (4) is uniformly provided with limiting grooves (6) that are coupled with the limiting strips (5). The bottom of the movable plug (8) is rotatably connected to a lead screw (9), which is threaded into a nut (10). The nut (10) is fixedly installed on the tail plate (11) at the bottom end of the bottom cylinder (7). The bottom of the movable plug (8) is fixedly installed with a plug rod (12), which is movably inserted into the tail plate (11); The inner wall of the bottom cylinder (7) is connected to a sand discharge pipe (13), the end of which extends to the outside of the bottom cylinder (7) and is equipped with a sand discharge valve (14).

2. The steel structure unloading tool according to claim 1, characterized in that: A support frame is also provided, with the vertical cylinder (1) and support plate (3) located between the support frame and the steel component (21).

3. The steel structure unloading tool according to claim 2, characterized in that: The support frame consists of a horizontal plate (15) and legs (16) evenly arranged at the bottom of the horizontal plate (15); The top of the horizontal plate (15) is provided with a receiving groove (17) for placing the vertical cylinder (1), and the bottom of the receiving groove (17) is provided with a through groove (18) for accommodating the bottom cylinder (7). The sidewall of the receiving groove (17) is evenly provided with flower grooves (19), and the outer wall of the vertical cylinder (1) is evenly provided with splines (20) coupled to the flower grooves (19).

4. A steel structure unloading tool according to claim 3, characterized in that: The top left and right sides of the horizontal plate (15) are also provided with auxiliary support rods (22) for supporting the steel components (21).

5. A steel structure unloading tool according to claim 4, characterized in that: The bottom end of the auxiliary support rod (22) is movably inserted into the vertical groove (23) opened on the horizontal plate (15); A side groove (24) is provided between the inner wall of the vertical groove (23) and the outer peripheral wall of the horizontal plate (15), and a pad (25) for supporting the auxiliary support rod (22) is slidably provided in the side groove (24).

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